Thank you for the wiring diagram, Eric.
If there is no thermal FUSE, what sort of thermal protections are there? Thermal switches, i.e. thermostats, as you call them? Any idea where exactly it (they) might be located on this model? Also, if the motor switch was bad, would the drum still turn, as mine does? Is it necessary to test the hi limit switch and the flame sensor? (It's hard to get down on those old knees anymore)